Ma

Ma, or molar mass, is the mass of one mole of a substance, usually expressed in grams per mole (g/mol). A mole represents a specific number of particles—about 6.022 x 10²³ atoms, molecules, or ions. Ma tells you how much one mole of a substance weighs. For example, water (H₂O) has a molar mass of approximately 18 g/mol, meaning one mole of water weighs about 18 grams. It’s a useful way to relate the number of particles to measurable weight, helping chemists measure and mix substances accurately for reactions.